# AD 80-19-12 R1: Engine Mount Structure

- Type: Airworthiness directive
- Status: Current
- Products: Textron 76
- Effective: June 14, 1982
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-4404
- Registered aircraft: 151 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3C55220870A74E3D862569AF0076872C.0001
- DRS record last changed: January 21, 2026
- Page: https://openairdocs.org/ad/80-19-12-R1

## The airworthiness directive

80-19-12 R1 BEECH: Amendment 39-3916 as amended by Amendment 39-4404. Applies to Model 76 (Serial Numbers ME-1 through ME-415) airplanes certificated in any category, that have 100 hours or more time-in-service.

COMPLIANCE: Required as indicated unless already accomplished.

To ensure the integrity of the engine mount structure, accomplish the following:

A) Within the next 50 hours time-in-service after the effective date of this AD and thereafter at intervals not to exceed 100 hours time-in-service, accomplish the following:

1. Remove the engine cowlings in accordance with instructions in the Aircraft Manufacturer's Maintenance Manual.

2. Perform a dye penetrant inspection of the two lower tubes of each engine mount assembly which extend from the firewall to the lower engine-mounting pads in accordance with FAA Advisory Circular AC 43.13-1A, paying particular attention to the area just aft of the gusset on the forward end of the tubes.

NOTE: Thoroughly clean and degrease the area to be inspected; however, it is not necessary to remove the paint.

B) Each 50 hours time-in-service after the dye penetrant inspections required by Paragraph A), visually inspect the same areas of the lower engine mount tubes.

C) Prior to further flight, repair any cracks detected in the engine mount lower tubes as a result of any inspection required by this AD. Contact the Sales and Service Department, Beech Aircraft Corporation, Liberal, Kansas 67901, telephone (316) 624-1613, for repair instructions.

D) The time-in-service for the inspections required herein may be adjusted up to 10 hours to facilitate accomplishing the inspections concurrent with other scheduled maintenance on the airplane.

E) The repetitive inspections required by paragraphs A) and B) of this AD may be discontinued when engine mount assemblies are replaced with P/N 105-910019-1 engine mount assemblies in accordance with Beechcraft Service Instructions No. 1147, Revision 1.

F) Any equivalent means of compliance with this AD must be approved by the Chief, Aircraft Certification Program, Federal Aviation Administration, Room 238, Terminal Building 2299, Mid-Continent Airport, Wichita, Kansas 67209, telephone (316) 942-4285.

Amendment 39-3916 became effective September 25, 1980.

This Amendment 39-4404 becomes effective on June 14, 1982.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A29CE](https://openairdocs.org/tcds/A29CE): Textron Aviation Inc.; names 1 of 1 models: 76

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 151 (151 by airframe model, 0 by engine model)
- Makers: Beech 151

Models with the most aircraft:

- [Beech 76](https://openairdocs.org/model/beech-76): 151 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/80-19-12-R1/models.md
Every aircraft: https://openairdocs.org/ad/80-19-12-R1/aircraft.md

## Related documents

- [AC 43.13-1B CHG 1 Ed Update](https://openairdocs.org/ac/43.13-1): Acceptable Methods, Techniques, and Practices—Aircraft Inspection and Repair. Cited as AC 43.13-1A in the AD's requirements

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